Parts for your 2004 Toyota Mark x-Thrust bearing

2004 Toyota Mark X thrust-bearing — is it a thing on this model?

Short answer: a separate clutch thrust/release bearing isn’t used on the 2004 Toyota Mark X. Toyota’s own technical literature for the GRX120 series (New Car Features manual, 2004) lists a 6‑speed Super ECT Aisin automatic as standard fitment, so there’s no clutch pedal and no clutch release mechanism that would require a thrust/throwout bearing. The Toyota Electronic Parts Catalog for GRX120 backs this up — there’s no throwout or release bearing listed for this car. What it does have, like virtually every engine, is a crankshaft thrust bearing surface. Toyota’s GR‑series engine repair manuals (4GR‑FSE/3GR‑FSE) specify that crankshaft end‑float is controlled by the No. 3 main bearing with integral thrust faces. That’s an internal engine part, not a routine service item.

Why it’s not used as a standalone part: the Mark X drives through a torque converter and flexplate, so there’s nothing for a release bearing to press on. The auto trans handles take‑off smoothly with fluid coupling, and gear selection is handled hydraulically and electronically — no clutch fork, no pressure plate, no release (thrust) bearing.

• Transmission spec: Aisin 6‑speed Super ECT (A960E family) per Toyota NCF — no manual clutch hardware.
• Parts listing: Toyota EPC for GRX120 shows no clutch release/thrust bearing assembly.
• Engine design: GR‑series uses thrust faces on the No. 3 main bearing to manage crank end‑float, inspected during rebuilds only.

If someone’s searching for a “2004 Toyota Mark X thrust-bearing” as a service part, they’re probably chasing a noise or driveline feel that won’t be fixed by a non‑existent release bearing. Good checks instead: condition of the torque converter, flexplate cracks, engine and trans mounts, and fresh WS‑spec ATF. If there’s a suspicion of crankshaft end‑float issues, that’s specialist work — measured with a dial gauge and addressed during an engine teardown. It’s rare on well‑maintained GR engines but not impossible if there’s been oil starvation or extreme mileage.

Bottom line for local owners: there’s no standalone thrust/throwout bearing to replace in normal servicing on a 2004 Mark X. Keep the auto serviced on time, use the correct fluids, and it’ll rack up the kilometres without fuss.

FAQs

Does a 2004 Toyota Mark X have a thrust bearing?

It doesn’t have a separate clutch thrust/release bearing because it’s an automatic. It does have crankshaft thrust faces integrated into the No. 3 main bearing inside the GR‑series V6, but that’s an internal engine component checked during rebuilds, not regular servicing.

What symptoms point to crankshaft thrust bearing wear on a Mark X?

Excessive crank end‑float can show up as harsh fore‑aft movement of the crank pulley, intermittent knocking at idle that changes with slight fore‑aft load, or visible pulley alignment wander. Confirmation requires a proper end‑float check with a dial gauge. If it’s worn, the fix is an engine‑out repair with main bearing service.

I’m planning a manual conversion — will I need a thrust/release bearing then?

Yes. Any manual swap (with the appropriate gearbox, clutch, and hydraulics) will require a clutch release bearing matched to the chosen clutch and bellhousing. That’s separate to the engine’s internal thrust faces and is specified by the transmission/clutch kit used.